I really really like the concept for this game, and after playing it I see this has a lot of potential. First off, I've never seen someone make an RPGMaker game look like this, honestly I'm pretty impressed that its complete 3D space. I have probably around a Low-Mid tier PC and I felt like I had no noticeable issues running this game. Though combat was a tad boring simply because there are no abilities added in.
The things I would look for in combat with a game like this would be the addition of abilities, it looks like you plan on using TP for that, which I like. Another thing that I think a game like this would benefit from would be what Monster Girl Quest Paradox does, where when an enemies HP gets low enough, they'll try to tempt you into losing; perhaps an example I could think of off the top of my head would be the slimegirl asking "Why don't you just give my slime a try? I'm sure it'll feel good on your body..." Or something like that. There's room to reuse the loss animation for an idea like that, or to add a new animation for the temptation all together. Honestly I feel like temptation in these types of games is the hardest part for the player to overcome rather than combat, since most people can win fights with relative ease.
Tl;dr: It's an early access game that has lots of promise. People who like games like Monster Girl Quest will 100% enjoy what's to come in the future. Keep up the great work! :)